Search Archives

> if("fit$coef[[2]]" == "NA") {.cw = 1} See ?is.na

sjaffe wrote: > anything shorter than as.vector(as.matrix( df ) )? df[[1]]

Hint: "somebody let me know how to >>>>>>>>>>>get<<<<<<<<< the function from the name 'f'?"

> Another alternative is to use Geany [1]. It would save you the trouble > of learning Emacs, /s/save/deprive /s/trouble/thrill :)

See %% under ?Arithmetic tj wrote: > Hi, > > anyone here who knows how to determine if an integer is "odd" or "even" in > R? > Thanks. > > > tj

> > You could also replace "!duplicated" in my function with "unique" ... > It turns out you can't, of course :).

?Arithmetic Eric Ferreira wrote: > Dear useRs, > > How do I ask for the rest of a division? > > For instantce, in C is like: > > 4%2 = 0 > > Best regards, >

Datta, Ronjon wrote: > Hi, > I just need to know where the R was developed, for a journal article citation. There's a function for that! citation()

>> >> The stringAsFactors = False option did not work either. > > False <> FALSE > > in addition Vincent was getting an error since he used stringAsFactors, instead of stringsAsFactors as the argument name.

Ista Zahn wrote: > Hi Tao, > I think you just need latex(x, file="") > I think I misunderstood the question, I believe that is what is needed here.

Cristian Montes wrote: > Even shorter is > > x<-c("a","b","c","d") > paste(x, sep="+") > x<-c("a","b","c","d") > paste(x, sep="+") [1] "a" "b" "c" "d"

<snip> > cor.test(Both[,1],Both[,2]) What does > Both[,1] show you? > cor.test(Both[,1]>2.5,Both[,2]>2.5) What does > Both[,1] > 2.5 show you?

Davide Massidda wrote: > Dear all, > I have installed R on Linux/Ubuntu 8.04. But you don't say how. Are you compiling R yourself or installing the Ubuntu package from CRAN?

On 08/18/2010 10:05 PM, Tal Galili wrote: > Hi Stephen, > > #first: > install.packages("reshape") > #Then try: > library(reshape) > #and then > ?melt > ?cast > This is also useful: http://www.jstatsoft.org/v21/i12/paper

> "[" is a function, and you want to use it on each element of the list, > so... > > lapply(x, "[", c(1:7)) and the call to c() is of course not necessary, since ":" will generate a vector.

Changbin Du wrote: > It does not work. > > >> outcome.label<-LETTERS(outcome.predict) > Error: could not find function "LETTERS" That is not when Henrique typed. LETTERS is a vector, and must be indexed as such, i.e., with "[]".

Phil Spector wrote: > Jahan - > Try > > dat$target = toupper(dat$target) Note that in this case, the above *will* coerce dat$target to a character vector, which may or may not be what is intended.

See ?dim, ?nrow, ?ncol. MeMooMeM wrote: > Hi, > > Is there a direct command to get the row and col length of a matrix? > > My ugly solution is: length(mtx[,1]) and length(bcf[1,]) > > Thanks! >

> > See ?apply. The apply function works on *matrices*. Actually arrays, and matrices are arrays with 2 dimensions. > characters. This is all explained in the first paragraph of ?apply. > Also see ?as.matrix

Wensui Liu wrote: > agree, > i think R is more like a standard program language than SAS. however, > SAS programmer might not feel intuitive to pick up R. That says more about SAS programmers than it does about R.